# Response vs Shift Pro

The clearest difference is ads: Response at none against Shift Pro's shown. Response also leads on update cadence (every 5 days vs every 2 months) and iOS requirement (8.0 vs 12.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Response ships an update every 5 days, Shift Pro every 2 months. The most recent releases landed on October 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Response | Shift Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 55 MB | 29 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ECU=SHOP](https://appshunter.io/developer/1389703440) | [NK RACING PARTS COMPANY LIMITED](https://appshunter.io/developer/1500859331) |

## What reviewers say

### Response

[App page](https://appshunter.io/ios/app/response/id1481063226)

**Features:** Vision Pro support

**In-app purchases:** none


### Shift Pro

[App page](https://appshunter.io/ios/app/shift-pro-nk-racing/id1596897355)

This application allows users to tune the fuel distribution of injectors. It provides functions to display, configure, and log data, as well as open and save configuration files.

**Highlights:** Display fuel data, Configure fuel data, Open and save files, Data logging

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Response free?

Response is free to download, with no in-app purchases.

### Is Shift Pro free?

Shift Pro is free to download, with no in-app purchases.

### Do Response or Shift Pro have ads?

Shift Pro shows ads; Response does not.

### Which is updated more often, Response or Shift Pro?

Response ships an update every 5 days, and Shift Pro every 2 months. Most recently, Response was updated on October 29, 2026 and Shift Pro on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*